The in-cylinder flowfield and the turbulence scale at the ignition timing play an important role in enhancing the propagation speed of the initial flame and the engine combustion. The aim of this work is to investigate the effect of tumble and swirl flows on the turbulence scale near the top dead centre in a four-valve spark ignition (SI) engine by an experimental method. In this study, various flowfields such as tumble and swirl flows were generated by intake flow control valves. For investigation of the flowfields, the single-frame particle tracking velocimeter (PTV) and the twocolour particle image velocimeter (PIV) techniques were developed to clarify the in-cylinder flow pattern during the intake stroke and the turbulence intensity near the spark plug during the compression stroke respectively. In addition, the flame propagation was visualized by an ICCD camera, and its images were analysed to compare the flowfields. From these experimental results, the effects of tumble and swirl flows on the turbulence scale and the flame propagation speed were clarified.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effects of tumble and swirl flows on turbulence scale near top dead centre in a four-valve spark ignition engine


    Contributors:
    Lee, K H (author) / Lee, C S (author)


    Publication date :

    2003-07-01


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






    High-frequency ignition characteristics in a 4-valve spark ignition engine with tumble-swirl flows

    Bae,C.S. / Leem,J.S. / Ha,J.Y. et al. | Automotive engineering | 1998


    Predictions of tumble and turbulence in four-valve pentroof spark ignition engines

    Achuth, M. / Mehta, P. S. | British Library Online Contents | 2001


    Predictions of tumble and turbulence in four-valve pentroof spark ignition engines

    Achuth,M. / Mehta,P.S. / Indian Inst.of Technology,IN | Automotive engineering | 2001